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The CRAs recently entered into a consent decree with the New York State Office of the AG to remove medical derogs if the debt has been paid by insurance.
Send a copy of proof of payment by the insuror to the CRA and request deletion of the derogs based on the consent decree.
As for the charge-off, she has a billing related issue on a charge card.
They continued to accept payments.
I would treat by way of dispute under the Fair Credit Billing Act if she became aware within the last 90 days.
I would pursue the charge-off by contact with their executive office, not their customer service number.
I assume they deposited the payments she made, so there is also error on their part in processing payments on a dead account without noticing the consumer.
I would speculate that someone in upper-management would grant a deletion of reporting of delinquencies if they suffered no monetary loss.